Comment 9 for bug 1513477
Revision history for this message
| TJ (tj) wrote Re: PCI device has incorrect Vendor:Device ID when Southbridge used 0 wait reads | #9 |
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0e1f616
(Get the code!)
As I suspected the cause was in hardware, and specifically due to the motherboard using Master Write 0-wait state access, which meant the device had not completed mapping its registers into the PCI Config address space when the kernel probed for the Vendor ID.
User applied my recommended BIOS configuration changes and the device is now correctly identified.
The solution is to alter the BIOS settings. In this case the "LDT and PCI Bus Control", and set "PCI1/PCI2 Master 0 WS Write" to Disabled to enforce 1 wait state. The device also had to be in ports PC1 or PCI2 (nearest the AGP slot) on this Abit KV8-MAX3 mobo.